Sectional hood for gas and air fuel mixing chambers



(No Model.) 7

0. H. MILLER.

SEUTIONAL HOOD FOR GAS AND AIR FUEL MIXING GHAMBERS.

No 881,682. Patented Apr. 24, 1888.

Witnesses. Jul/6mm" g j m 63% rZes 21am,- Hex iff liNiTnn STATES PATENT Trice,

CHARLES H. MILLER, OF ERIE, PENXSYLVANIA.

SECTICNAL HOOD FOR GAS AND AIR FUEL lVHXlNG CHAMBERS.

SPECIFICATION forming part of Letters Patent No. 381,632, dated April- 24, 1888.

Application filed October 21, mm. Serial No. 253,045. (No model.)

To 6655 1072,0172, it and concern.-

Be it known that I, OimnLEs H. MILLER, a

citizen of the United States,residing at Erie, in the county of Erie and State of Pennsylvania, haveinvcnted certain new and useful Improvements in Sectional IIoods for Gas and Air Fuel Mixing Chambers; and I do hereby declare the following to be a full, clear, and exact description of the inventioinsueh as will enable others skilled in the artto which it appertains to make and use the same, reference being bad to the accompanying drawings, and to the letters of reference marked thereon, forming part of this specification. My invention consists in the improvements in sectional hoods for gas and air fuel mixing chambers hereinafter set forth and explained, and illustrated in the accompanying drawings, in which Figure 1 shows a side view of my improved sectional hood. Fig. 2 shows a side view of a gas and air fuel mixing chamber with one of the sections of my improved hood in place thereon. Fig, 3 shows. a perspective view of the two sections of my improved hood sepa rate from each other.

Like letters refer to like parts in all of the figures.

The objects of my improvement are to construct a hood for gas fuel-mixing chambers in sections, so that it can be put on or taken off without interfering with the pipe-connections, and to provide a regulating=damper, by means of which the airsupply can be varied at pleasure.

In the construction shown in the drawings, A is a gas and air fuel mixing chamber, consisting of a hollow globulanshaped body provided at one end with a screw-threaded neck, B, in which a gas supply pipe, 0, is secured, and at the other or opposite end with a larger screw-threaded neck, D, in which a pipe, E, leading to the burner, is secured, the chanr her A being also pierced with openings G near the neck B, through which air passes into the mixingchamber A, to be intermingled with the gas supplied from the pipe 0, after which the intermixed gas and air passes through the pipe E to the burner. (Not shown.) These features do not constitute any part of my in vention, but show the operation and applica tion of my device, hereinafter described In the construction of my improved see tional hood F for gas and air fuel mixers I make it in two sections, I and J, (sec 3,) so that when they arejoined together, as hereinafter described, the complete hood F, Fig. 1, will fit over and embrace the neck B onthe mixing chamber A, to which it can be secured by means of a thumb'screw, H, and inclose the openings G of the mixing-chamber, as illus trated in Fig. 2, by the position of the section therein shown. The sections I and .I are provided with the semicircular flanges i and j, respectivcly,whieh hear at one end against the neck B of the mixer A and are held in position by the set-screw H in the flangej. On the upper part of one of the sections J, I make a flange, L, in which I provide an opening, N, and on the upper part of the other section, I,

I make shook-shaped lip, 1?, adapted to enter the opening N and engage with the upper part of the flange L when the sections I and J are brought together, and through the lower ends, Q and R, I place a thumb -screw, S, which when screwed into place holds the two sections I and J securely together, forming a complete hood, covering the openings G in the mixing chamber A. Ihe lower portions, Q and R, of the sections I and J, I make semi-tubular in shape, so that when the sections I and J are brought together the parts Q, and R form a downwardl Y projecting tubular passage, through which air is supplied to the inside of the hood F, and thence through the openings G to the mixing-chamber A. The part of the clampingscrew S passing through the tubular passage formed by Q and B, I make,preferab] y, square in cross seetion, and place thereon adarnper, T, having a socket, a, adapted to fit upon the square portion 1) of the screw S. so that by turning the screw S the damper T will turn therewith, by means of which the damper T can be adjusted to vary the air-supply as desired. It is obvious that my improved hood can be applied to or detached from the gas and air fuel mixing chamber without disturbing the pipe-connections at any time when desired, and also that the air supplied to the burner can be controlled at pleasure,

ICO

Having thus fully described my invention, so as to enable others to make and use the same,what I claim as new, and desire to secure by Letters Patent of the United States, is-- 5 1. A hood for a gas and air mixing chamher, formed in two sections, having means for securing them together, and the flanges '17 and j, and provided with a tubular extension for the inlet of air, in combination with a damper [O pivoted in the said tubular extension for regulating the inlet of air, substantially as set forth.

2., A hood for a gas and air mixing chamber, consisting of the two sections I and J,provided with the semicircular flanges iand j, the

semi tubularextensions Qand R,theperforated 15 flange L, and the hook-shaped lip P, in combination with the damper T, pivoted in the said extensions Q and R, and the thumb-screws S and H, for operating the damper and clamping the sections in position, substantially as 20 set forth.

In testimony whereof I affix my signature in presence of two witnesses.

CHARLES H. MILLER.

Witnesses:

H. J. OURTZE, WV. D. FEIDLER. 

